Cutter-head.



No. 650,764. Patented May 29, I900. S. J. SHIMER.

CUTTER HEAD.

(Application filed Mar. 26, 1900.) (No Model.) 2 Sheets-Sheet I.

WITNESSES d g ,(S MnueZe/WW i No. 650,764. Patented May 29, I900. S. J.SHIMEB.

CUTTER HEAD.

(Application filed Mar. 26, 1900.)

(N0 Model.) 2 Sheets-Sheet 2.

Q WITNESSES 4 zymzzazJdffww/er;

D 5 y l h] mmm 5 fl/ g 2 A 5 1 THE mmms FEYERS ca, FNOTO LITHQ..WASHINGTON. o. c.

NITED STATES PATENT Fri-CE.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 650,764, dated May 29,1960. Application filed March 26, 1900. Serial No. 10,231. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL J. SHIMER, a citizen of the UnitedStates,residi n g at Milton, in the county of Northumberland and Stateof Pennsylvania, have invented new and useful Improvements inGutter-Heads, of which the following is a specification.

My present invention relates to cutterheads; and the objects of the sameare to provide efficient means for properly dividing or distributing thework which each bit or cutter is required to do in cutting a tongue orgroove in lumber with a View to giving to the bits which have the majorportion of the work to do a comparatively-large seat upon thecutter-head in the line of out andto so distribute the strain on theholding-bolts that the Work may be accomplished 011 hard wood withoutturning the cutters out of adjustment. In order to accomplish thesedesirable objects, I have formed two bit-seats Within the limit of eachquarter-section of the cutterhead, and I have also located eachalternate pair of bits or cutters upon opposite sides of an expansiblecutter-head, so that each side of the cuttenhead is provided with twopairs of cutters. By this arrangement I am onabled to divide the work ofcutting a tongue into four parts, two upon each side of the tongue to becut, and in this way the work is equally and properly distributed aroundthe cutter-head without undue strain at any one point. Heretoforecircular bits made to cut a single tongue or groove were divided in twoparts and each set at an opposite incline for clearance, one partcutting all above the center line of the tongue and the other cuttingall below the center line of the tongue and overlapping within the spacethe tongue occupies. This construction made it necessary to form thetongue-bit seat upon the smallest bit diameter. In order to make the twocutting edges upon such a circular bit, the notch in it must be cut deepenough to form the inner cutting edge, below which and Within the innercircle of the bit the seat limit is confined. It therefore follows thatthe tongue forming section of such a circular tongue-bit is limited inits seat-surface to the small base that goes within the smallest cuttingdiameter of such tongue-bit.

In the accompanying drawings, which form edges of each pair of bitsoverlapping.

a part of this specification, Figure 1 is a perspective View of acutter'head made in accordance with my invention. Fig. 2 is a bot tomplan View of the same. Fig. 3 is a per spective View of the head withthe cutters re moved and the parts separated. Fig. 4 is a perspectiveview of one of the cutters. Fig. 5 is a similar View of the companioncutter. Fig. 6 is a perspective view of the bolt.

Like numerals of reference designate like parts wherever. they occur inthe different views.

In the drawings the numerall designates the upper section of thecutter-head, and 2 the lower section of the same. On each section of thehead two segmental portions 3 are formed. When the two sections of thecutter head are in operative position, these segments 3 each form aquarter=section of the cutter head, and formed within each segment aretwo bit-seats 4. 5. These seats are arranged in pairs, each pair beinglocated in a segment or quarter-section 3 of the head and the seat 4.being of larger area or diameter than the seat 5. The bit 6 is fitted tothe seat 4 and is held in adjusted position by the bolt 7. The smallerbit 8 is held in the seat 5 by the bolt 9.

' It will be noted that the seats 4 in each section of the head arelocated diagonally opposite each other and are oppositely inclined,while the seats 5 are also similarly disposed and inclined.Everygalternate pair'of seats on the opposite sides of the head arereversely inclined. The bits 6 cut the lower half and shoulder of thetongue and the bits 8 cut the round corners and the outer edge of thetongue, the cuttilpg 3 this arrangement the bit 6, which cuts the largerarea of the tongue, is provided with a seat of proportionately-largerarea than the seat 5 forthe bit 8, and the result is that an equabledivision of the work and a proper distribution of the strain areaccomplished. Another advantage of this arrangement is that the cuttingedge of the bit 8 may be adj usted to cut a tongue of more or lesslength independently of the adjustment of the bit 6. In fact, the bitsare independently adjustable for depth of cut, and when seated, asdescribed, in an expansible head adjustment in width of tongue as wellas depth can be readily accomplished.

Having thus fully described my invention, what I claim is 1. In acutter-head, circular bit-seats arranged in pairs Within the limitofeach quarter-section around the head, each alternate pair of seats beingupon opposite sides of the head, each pair of seats consisting of alarge and a smaller seat, and circular cutters secured in said seats,substantially as described.

2. In an expansible cutter-head, a series of circular bit seats arrangedalternately in pairs upon opposite sides of the head, andindependently-adjustable bits secured in said seats, the bits of eachpair being of difierent size to fit corresponding seats, as and for thepurpose described esdre i uesses.

SAMUEL J. SIIIMER. Witnesses:

W. H. BECK, II. A. KERR.

